stratum+tcp://europe.kawpow-hub.miningpoolhub.com:20611 is dead. Error

No connection could be made because the target machine actively refused it

However
stratum+tcp://asia.kawpow-hub.miningpoolhub.com:20611
stratum+tcp://us-east.kawpow-hub.miningpoolhub.com:20611
are working fine.